She laughs, first at the joke and then when he takes off. She stalls for a second to shake her head, feeling like she should have predicted this. Then she runs after him, trying to keep up despite having the shorter legs.

"Guessin' it's a surprise where we're headin'?" She yells after him. She's not particularly concerned whether he actually tells her or not. Even a chase is more fun that what she'd planned for the evening.